NineByNine

NineByNine – Sudoku with Progression NineByNine reimagines Sudoku with a modern, progression-driven experience. Earn XP, unlock achievements, and improve your skills as you solve beautifully crafted puzzles — whether you’re just starting or aiming for mastery. THREE DIFFICULTY LEVELS • Easy – Learn the fundamentals at your own pace • Medium – Strengthen your logical thinking • Hard – Test your skills with expert-level grids DAILY CHALLENGES Play a new challenge every day to earn bonus XP and coins. Build streaks, unlock rewards, and turn Sudoku into a rewarding daily habit. PROGRESSION & ACHIEVEMENTS • Level up by completing puzzles • Unlock 30+ achievements across multiple categories • Track perfect games, speed runs, and streaks HINTS & LIVES SYSTEM • Start each game with 3 hints and 3 lives • Earn more as you level up • Learn solving techniques through strategic hint usage • Balanced challenge without unnecessary frustration DETAILED STATISTICS • Total games played and win rate • Best completion times by difficulty • Perfect game tracking (0 mistakes) • Average completion times • Daily challenge streak history LIGHT & DARK MODE Choose between system, light, or dark mode. Designed to look great day or night, adapting seamlessly to your preference. CLEAN & INTUITIVE DESIGN • Smooth animations and satisfying feedback • Auto-save and resume anytime • Undo support for quick corrections • Optimized for all iPhone sizes OFFLINE & PRIVACY-FIRST • Play fully offline — no internet required • No ads, no tracking, no data collection • All progress stored locally on your device PERFECT FOR • Sudoku enthusiasts seeking a premium experience • Beginners learning logical thinking • Players who enjoy daily challenges and progression • Anyone looking for a calm, focused brain workout WHY NINEBYNINE • Unlimited puzzles with guaranteed solutions • Progression-based rewards system • Daily challenges and streaks • Achievements and detailed statistics • Clean, modern interface • Free to play, no ads, privacy focused